While they could not be 100 per cent certain, in part due to the difficult camera angle and the hand covering the speaker's mouth, the experts concluded she was indeed likely to be using colourful language.

Sir Andy is Britain’s youngest knight of recent years. Already an OBE, he was an obvious choice for a knighthood after a year in which he cemented his status as an all-time sporting great.

The honour capped a year in which he became a father, won a second Wimbledon title and a second Olympic gold medal, picked up a third BBC Sports Personality of the Year Award and was named by Telegraph readers as Britain’s greatest ever sportsperson.

Kim supporting Sir AndyCredit:
Eddie Mulholland

Sir Andy was honoured for both his contribution to tennis and for his charity work as an ambassador for Unicef, the World Wide Fund for Nature, Malaria No More and the Duke of Cambridge’s United for Wildlife initiative.

Each year he takes part in a charity exhibition match in Scotland to raise money for Unicef and local good causes.

The youngest person to receive a knighthood or damehood in modern times was the sailor Dame Ellen MacArthur, who was 28 when she was honoured.

The youngest knight in history was Prince George, the future George IV, who was aged three when he was made a knight of the garter in 1765.